US 6,531,808 B2 · Beam index type cathode ray tube

Abstract

A beam index type cathode ray tube having a screen divided into a plurality of areas and a plurality of electron guns corresponding to the divided screen areas. The beam index type cathode ray tube includes a tube of which inner atmosphere is maintained in a vacuum state and a screen formed at one side of an inner surface of the tube. The screen has phosphor stripes and index stripes. A plurality of electron guns are mounted in the tube facing the screen and a plurality of deflectors are mounted on the tube corresponding to the electron guns to deflect electron beams which are radiated from the electron guns to the screen. A plurality of detectors are mounted on the tube corresponding to the electron guns to sense lights emitted from the index stripes.

Claims7

Dependent claims

A beam index type cathode ray tube comprising:

a tube having an inner atmosphere maintained in a vacuum state;
a screen formed at one side of an inner surface of the tube and having phosphor stripes and index stripes;
a plurality of electron guns each of which radiates an electron beam, the electron guns mounted in the tube and facing;
a plurality of deflectors mounted on the tube which deflect the electron beams, each of the plurality of deflectors corresponding to a respective one of the plurality of electron guns and deflecting the respective electron beam;
and
a plurality of detectors which sense lights emitted from the index stripes, each detector mounted on the tube and corresponding to one of the electron guns.

3 more elements

Dependencies are inferred from the claim text.

Beam index type cathode ray tube

Life of this patent

Beam index type cathode ray tube

Life of this patent

Abstract

Claims7